Ask HN: How do I improve at analysis and project management as a junior dev?

I've been working my first SWE job for a few months now, and I've just been handled my first big project.

I've done an analysis and I'm realising now, close to the deadline, that by working on each component, I miscalculated some parts or couldn't predict some needed developments at all. Even though I tried thinking about the entire flow of the feature, some things just came to mind as I was developing it.

How do I improve at predicting what will be needed, before writing a single line of code? Would building a wireframe of the entire feature help? Is it a skill that just comes with lots of trial and error?